Exhaust Back Pressure Actuator Valve - Ford Powerstroke Diesel Forum
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Old 01-28-2011, 05:52 AM
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Exhaust Back Pressure Actuator Valve

01, F350, 7.3, 167,000 miles

4" exhaust, edge programer, X wheel, K&N intake.

So im wheeling down the road about 75 mph, 2500 RPM, 5-7 LBS boost, and I hear a strange noise (like a heater fan squeal) in the turbo area. This last for about 4-5 seconds, then gone. All the gages looked good, oil, egt, ect.

I drive it another 200 miles home with no other issues. The next morning i go out to find the whole under side of the truck dripping in motor oil, and nothing on the dip stick. I start looking under it and notice oil spray on the up pipe, and the majority of the oil on top of the bell housing.

So I know it is on the back side of the motor and cant see it without removing the intake, so I remove that & the turbo (since I just had it rebuit & install the X wheel) thinking an o ring was messed up. All the o rings are good, the only place this could have dumped from is the actuator valve rod.

So, is it possible to dump that much oil (over a gallon) out this in that short of time?

What would cause this to dump oil out of there & not drain down the return line?

Any body know where to get a pedistal to eliminate the actuator? Diesel O rings.com are on back order?

Thanks any insite would be great.
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Old 01-28-2011, 11:14 AM

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gut that sucker and pipe tap the hole and plug it. no more leaks. and yeah i could say its possible. as long as you dont have oil up at the hpop at all.
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